Home > Sludge Blanket Measurement > Fixed Sludge Blanket Level
The SludgeWatch 8200w² Monitor provides a reliable method of detecting the sludge blanket level in clarifiers and settlement tanks, or increasing levels of suspended solids or sludge density in large range of processes.
Control of the sludge blanket level is essential to ensure discharge consent compliance and efficient control of the treatment process. If the sludge blanket in a settlement tank is allowed to rise close to the surface there is a danger that solids will leave the tank and contaminate the next process stage or be discharged into the water course. Alternatively, if the sludge blanket is not allowed to stabilize or form a blanket or is pumped out too frequently the settlement process does not take place at all and solids will remain in suspension. Additionally there is a danger that thin sludge or water will be pumped from the bottom of the tank into the sludge handling system thus reducing the effectiveness of that process.
The SludgeWatch 8200w² Monitor is suitable for mounting outdoors on the bridge of settlement tanks, as the enclosure is IP65 rated and no outer enclosure is required. Provision must be made for transmission of the output signal to the control system; this is normally possible via spare slip rings. Where this is not possible a radio telemetry option is available, allowing transmission directly to the control system without the need for installation of cables.
| DIMENSIONS | 185 mm (7.2”) x 213 mm (8.3”) x 95 mm (3.7”) (H x W x D) | POWER RATING | 0.8A |
| WEIGHT | 1.4 kg (3.08 lbs) | TERMINAL CORE SIZE | Max Conductor Cross Section 2.5mm² |
| ENCLOSURE MATERIAL | Polycarbonate | RELAYS | 3 x SPCO |
| ENCLOSURE RATING | IP65 | RATING | 5A at 250VAC and 5A at 30VDC |
| CABLE ENTRIES | 1 x M20, 4 x M16, 1 x USB Type A | KEYPAD | 6 Key |
| TEMPERATURE RATING | -20 to +70°C, 0 to 95% Humidity (non-condensing) | DISPLAY | Sunlight Readable Black on White Graphic LCD |
| POWER SUPPLY | 100 to 240 VAC 9 to 36 VDC | BACKLIGHT | On/Off/On after keypress wtih user adjustable contrast |
| STANDARD SENSORS | DIMENSIONS | WEIGHT | OPTICAL PATH | RANGE | CABLE LENGTH | SERVICE REQUIREMENT |
| IR8 Sensor | 95 (3.7”) x 8 (0.3”) x 25 (0.9”) mm |
0.7 kg (1.54 lbs) inc 10m of cable | 8mm | 0 – 30,000 | 10 metres (32.8 ft) standard |
No routine servicing |
| IR15 Sensor | 95 (3.7”) x 15 (0.6”) x 25 (0.9”) mm |
0.7 kg (1.54 lbs) inc 10m of cable | 15mm | 0 – 10,000 | 10 metres (32.8 ft) standard |
No routine servicing |
| IR40 Sensor | 95 (3.7”) x 40 (1.6”) x 25 (0.9”) mm |
0.7 kg (1.54 lbs) inc 10m of cable | 40mm | 0 – 1,500 | 10 metres (32.8 ft) standard |
No routine servicing |
| IR100 Sensor | 95 (3.7”) x 100 (3.9”) x 25 (0.9”) mm |
0.7 kg (1.54 lbs) inc 10m of cable | 100mm | 0 – 200 | 10 metres (32.8 ft) standard |
No routine servicing |
| SENSOR | SETPOINT |
TYPICAL APPLICATIONS |
| IR100 – Range 0 to 200mg/l The sensor should only be used if the sludge is very ‘light’ with very clear supernatant. |
5 to 95% of range | Water Treatment |
| IR40 – Range 0 to 1,500mg/l This is the most commonly used sensor and is suitable for use on final settlement tanks in sewage treatment applications and clarifiers in water treatment works. |
5 to 95% of range | Water Treatment Clarifiers Sewage Treatment Final Settlement Humus Tanks |
| IR15 – Range 0 to10,000mg/l This sensor is also regularly used for sludge blanket detection and is normally used for primary settlement in sewage treatment and sludge thickeners in water treatment. |
5 to 95% of range | Water Treatment Sludge Thickeners Sewage Treatment Primary Tanks |
| IR8 – Range 0 to 30,000mg/l This sensor should be applied on sludge thickeners in sewage treatment plants. |
5 to 95% of range | Sewage Treatment Thickeners |
| Note: Sensor ranges and detection points are appoximate and depend on the site-specific nature of the treatment process. | ||
Sludge Blanket Level Infrared Sensor OptionsThe SludgeWatch 8200w² Monitor provides a reliable method of detecting the sludge blanket level in clarifiers and settlement tanks, or increasing levels of suspended solids or sludge density in large range of processes.
Control of the sludge blanket level is essential to ensure discharge consent compliance and efficient control of the treatment process. If the sludge blanket in a settlement tank is allowed to rise close to the surface there is a danger that solids will leave the tank and contaminate the next process stage or be discharged into the water course. Alternatively, if the sludge blanket is not allowed to stabilize or form a blanket or is pumped out too frequently the settlement process does not take place at all and solids will remain in suspension. Additionally there is a danger that thin sludge or water will be pumped from the bottom of the tank into the sludge handling system thus reducing the effectiveness of that process.
The SludgeWatch 8200w² Monitor is suitable for mounting outdoors on the bridge of settlement tanks, as the enclosure is IP65 rated and no outer enclosure is required. Provision must be made for transmission of the output signal to the control system; this is normally possible via spare slip rings. Where this is not possible a radio telemetry option is available, allowing transmission directly to the control system without the need for installation of cables.
| DIMENSIONS | 185 mm (7.2”) x 213 mm (8.3”) x 95 mm (3.7”) (H x W x D) | POWER RATING | 0.8A |
| WEIGHT | 1.4 kg (3.08 lbs) | TERMINAL CORE SIZE | Max Conductor Cross Section 2.5mm² |
| ENCLOSURE MATERIAL | Polycarbonate | RELAYS | 3 x SPCO |
| ENCLOSURE RATING | IP65 | RATING | 5A at 250VAC and 5A at 30VDC |
| CABLE ENTRIES | 1 x M20, 4 x M16, 1 x USB Type A | KEYPAD | 6 Key |
| TEMPERATURE RATING | -20 to +70°C, 0 to 95% Humidity (non-condensing) | DISPLAY | Sunlight Readable Black on White Graphic LCD |
| POWER SUPPLY | 100 to 240 VAC 9 to 36 VDC | BACKLIGHT | On/Off/On after keypress wtih user adjustable contrast |
| STANDARD SENSORS | DIMENSIONS | WEIGHT | OPTICAL PATH | RANGE | CABLE LENGTH | SERVICE REQUIREMENT |
| IR8 Sensor | 95 (3.7”) x 8 (0.3”) x 25 (0.9”) mm |
0.7 kg (1.54 lbs) inc 10m of cable | 8mm | 0 – 30,000 | 10 metres (32.8 ft) standard |
No routine servicing |
| IR15 Sensor | 95 (3.7”) x 15 (0.6”) x 25 (0.9”) mm |
0.7 kg (1.54 lbs) inc 10m of cable | 15mm | 0 – 10,000 | 10 metres (32.8 ft) standard |
No routine servicing |
| IR40 Sensor | 95 (3.7”) x 40 (1.6”) x 25 (0.9”) mm |
0.7 kg (1.54 lbs) inc 10m of cable | 40mm | 0 – 1,500 | 10 metres (32.8 ft) standard |
No routine servicing |
| IR100 Sensor | 95 (3.7”) x 100 (3.9”) x 25 (0.9”) mm |
0.7 kg (1.54 lbs) inc 10m of cable | 100mm | 0 – 200 | 10 metres (32.8 ft) standard |
No routine servicing |
| SENSOR | SETPOINT |
TYPICAL APPLICATIONS |
| IR100 – Range 0 to 200mg/l The sensor should only be used if the sludge is very ‘light’ with very clear supernatant. |
5 to 95% of range | Water Treatment |
| IR40 – Range 0 to 1,500mg/l This is the most commonly used sensor and is suitable for use on final settlement tanks in sewage treatment applications and clarifiers in water treatment works. |
5 to 95% of range | Water Treatment Clarifiers Sewage Treatment Final Settlement Humus Tanks |
| IR15 – Range 0 to10,000mg/l This sensor is also regularly used for sludge blanket detection and is normally used for primary settlement in sewage treatment and sludge thickeners in water treatment. |
5 to 95% of range | Water Treatment Sludge Thickeners Sewage Treatment Primary Tanks |
| IR8 – Range 0 to 30,000mg/l This sensor should be applied on sludge thickeners in sewage treatment plants. |
5 to 95% of range | Sewage Treatment Thickeners |
| Note: Sensor ranges and detection points are appoximate and depend on the site-specific nature of the treatment process. | ||
Sludge Blanket Level Infrared Sensor Options
WJF Instrumentation Ltd.
#5 3610 – 29th Street N.E.
Calgary, Alberta
Canada
T1Y 5Z7
Calgary Head Office
Toll-Free: (877)291-5572
Standard: (403)291-5570
Ontario & Maritimes Sales:
(905)809-6918
